CVE-2026-30974CWE-79

Copyparty volflag `nohtml` did not block javascript in svg files

Medium · published March 10, 2026

CVSS v3.1
4.6
EPSS
0%
Percentile
28.2
In the wild
Unconfirmed
What it is

Copyparty is a portable file server. Prior to v1.20.11., the nohtml config option, intended to prevent execution of JavaScript in user-uploaded HTML files, did not apply to SVG images. A user with write-permission could upload an SVG containing embedded JavaScript, which would execute in the context of whichever user opens it. This has been fixed in v1.20.11.

The record
Technical detail
CVSS v3.1
4.6 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00356 · 28.2th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-03-10T17:37Z
EPSS history
Timeline
  • 10 MAR 17:37Z
    Copyparty volflag `nohtml` did not block javascript in svg files
    cvelistv5